(19)
(11) EP 3 945 687 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.03.2022 Bulletin 2022/09

(43) Date of publication A2:
02.02.2022 Bulletin 2022/05

(21) Application number: 21187794.9

(22) Date of filing: 26.07.2021
(51) International Patent Classification (IPC): 
H04J 14/02(2006.01)
 G02B 6/293(2006.01)
(52) Cooperative Patent Classification (CPC):
H04J 14/0212; G02B 6/2938
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 28.07.2020 US 202063057566 P

(71) Applicant: Alliance Fiber Optic Products, Inc.
Sunnyvale, California 94089 (US)

(72) Inventor:
  • XIAO, Qijun
    Fremont, 94538 (US)

(74) Representative: Sadler, Peter Frederick 
Reddie & Grose LLP The White Chapel Building 10 Whitechapel High Street
London E1 8QS
London E1 8QS (GB)

   


(54) WAVELENGTH DIVISION MULTIPLEXING WITH PARALLEL ARRAYED SIGNAL PATHS FOR INCREASED CHANNEL DENSITY


(57) Disclosed herein is wavelength-division multiplexing (WDM) and demultiplexing with signal entry and exit in a common routing surface to increase channel density. In particular, disclosed is a WDM assembly including a plurality of common ports and a plurality of channel sets having one or more channel ports. The WDM assembly includes a first routing surface with a first WDM passband and a second routing surface offset from the first routing surface. The second routing surface is configured to reflect at least one signal passed through the first routing surface back through the first routing surface at a laterally different location. Optical signal paths of at least a portion of the common ports are parallel to and offset from one another. In certain embodiments, such a configuration may increase channel density and decrease a form factor (e.g., footprint).













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